This moves the entry rendering from a for loop/include tag in

review_detail.html to a template tag and accompanying

BaseReviewRequestPageEntry.render_to_string() method. This is a bit

more efficient and allows greater control of the context in the

template.
Entries can now supply custom context, and the context sets the

show_entry_statuses_area intelligently based on the entry position,

ensuring that this state always matches up to the location rendered on

the page.
Unit tests were added to ensure that entries are rendered correctly.

Unit tests pass.
Tested that all the review request entries were rendering correctly.